One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18)(19,26)(20,24)(21,29)(22,25)(23,30)(27,31)(28,32) involution — undirected(2,5)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,26,18,22,29,21,25)(20,27,32,23,30,28,31,24)(1,3,4,8)(2,6,5,7)(11,15)(13,16)(17,20)(18,23)(19,27)(21,31)(22,30)(24,25)(26,32)(28,29)(11,15)(13,16)(17,20)(18,24)(19,28)(21,31)(22,30)(23,25)(26,32)(27,29) involution — undirected(10,14)(13,16)(20,30)(23,24)(27,28)(31,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.